[jira] [Created] (FLINK-2761) Prevent instantiation of new ExecutionEnvironments in the Scala Shell

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-2761:
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             Summary: Prevent instantiation of new ExecutionEnvironments in the Scala Shell
                 Key: FLINK-2761
                 URL: https://issues.apache.org/jira/browse/FLINK-2761
             Project: Flink
          Issue Type: Improvement
          Components: Scala Shell
    Affects Versions: 0.10
            Reporter: Stephan Ewen


When someone mistakenly creates a new ExecutionEnvironment in the Scala Shell, the programs don't work. The Scala Shell should prevent new ExecutionEnvironment instantiations.

That can be done by setting a context environment factory that throws an error when attempting to create a new environment.

See here for a user with that problem:

http://stackoverflow.com/questions/32763052/flink-datasources-outputs-caused-an-error-could-not-read-the-user-code-wrappe/32765236#32765236



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